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Product comparison · 2 nas & storage servers

Lenovo Pro px4-400d vs QNAP TS-851 NAS/storage server Tower Intel® Celeron®

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  • 48specifications compared
  • 28differ
  • 20identical
  • 38known for one product only

Key differences

  • Storage drives installed
    • Yes
    • No
  • Total installed storage capacity
    • 12 TB
    • 0 TB
  • Number of storage drives installed
    • 4
    • 0
  • Number of storage drives supported
    • 4
    • 8
  • Supported storage drive types
    • HDD
    • HDD & SSD
  • Storage drive size
    • 3.5"
    • 2.5/3.5"
  • RAID levels
    • 0, 1, 5, 10
    • 0, 1, 5, 6, 10, JBOD
  • Processor family
    • Intel Atom®
    • Intel® Celeron®

Side by side

Differences highlightedShow differences only
86 specifications
A

Lenovo

Pro px4-400dView product
B

QNAP

TS-851 NAS/storage server Tower Intel® Celeron®

Model TS-851

View product
Storage7 differ
Storage drives installedDiffersYesNo
Total installed storage capacityDiffers12 TB0 TB
Number of storage drives installedDiffers40
Number of storage drives supportedDiffers48
Supported storage drive typesDiffersHDDHDD & SSD
Storage drive sizeDiffers3.5"2.5/3.5"
RAID levelsDiffers0, 1, 5, 100, 1, 5, 6, 10, JBOD
Supported file systemsKnown for oneext3, ext4, FAT32, HFS+, NTFS
Installed storage drive typeKnown for oneHDD
Storage drive capacityKnown for one3 TB
HDD speedKnown for one7200 RPM
Maximum supported storage capacityKnown for one16 TB
Processor2 differ
Processor familyDiffersIntel Atom®Intel® Celeron®
Processor frequencyDiffers2.13 GHz2.41 GHz
Processor modelKnown for oneD2701
L2 cacheKnown for one1 MB
Memory3 differ
Internal memoryDiffers2 GB1 GB
Internal memory typeDiffersDDR3DDR3L
Maximum RAM supportedDiffers2 GB8 GB
Flash memoryKnown for one512 MB
Memory slotsKnown for one1
Network2 differ
DHCP clientKnown for oneYes
DHCP serverKnown for oneYes
Jumbo frames supportDiffersNoYes
Supported network protocolsDiffersCIFS/SMB/Rally (Microsoft), NFS (Linux/UNIX), AFP Bonjour (Apple), FTP, SFTP, TFTP, HTTP, HTTPS, WebDAV, Windows DFS, SNMPCIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC
Wi-FiKnown for oneNo
Ports & interfaces2 differ
USB 2.0 ports quantityDiffers42
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityDiffers13
eSATA ports quantityKnown for one1
Design2 differ
Number of fansDiffers1 fan(s)2 fan(s)
Fan diameterKnown for one12 cm
LED indicatorsKnown for oneYes
Built-in displayDiffersYesNo
Cable lock slotKnown for oneYes
Cable lock slot typeKnown for oneKensington
Display typeKnown for oneLCD
Performance1 differ
Device classDiffersSmall & Medium BusinessHome & Home Office
BuzzerKnown for oneYes
Multilingual supportKnown for oneYes
Built-in optical driveKnown for oneNo
Card reader integratedKnown for oneNo
Management protocolsKnown for oneSNMP, Telnet
Web-based managementKnown for oneYes
Access Control List (ACL)Known for oneYes
Reset buttonKnown for oneYes
Security algorithmsKnown for oneFIPS 140-2, HTTPS, SSH, SSL/TLS
Number of usersKnown for one75 user(s)
Noise levelKnown for one35 dB
Software1 differ
Operating system installedDiffersEMC LifeLineQNAP Turbo System
Operating system versionKnown for one4.1
Power2 differ
Power supply unit (PSU) capacityKnown for one350 W
Power consumption (typical)Differs55 W56.79 W
Power consumption (sleep)Known for one0.72 W
AC input voltageDiffers100-220 V100-240 V
Fan voltageKnown for one12 V
Power supply locationKnown for oneBuilt-in
Weight & dimensions4 differ
WidthDiffers184.2 mm298.2 mm
DepthDiffers235 mm235.4 mm
HeightDiffers215.9 mm185.2 mm
WeightDiffers6.94 kg7.83 kg
Package weightKnown for one8.9 kg
Operational conditions2 differ
Operating temperature (T-T)Differs10 - 40 °C0 - 40 °C
Operating relative humidity (H-H)Differs8 - 85%5 - 95%
Storage relative humidity (H-H)Known for one5 - 95%
Storage temperature (T-T)Known for one-40 - 60 °C
Other featuresidentical
Digital Living Network Alliance (DLNA) certifiedKnown for oneYes

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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